We report ⁵⁹Co NMR measurements on three MBE-grown Co/Cu(111) multilayer films that show a progression of saturation magnetoresistance from {Δ}R/R=4% to {Δ}R/R=40%. Our results demonstrate unambiguously that the increase in magnetoresistance is correlated with an improvement in the quality of the interfaces in these MBE-grown materials.
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Thomson et al. (1994) studied this question.
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